J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1995-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.util; |
| 27 | |
| 28 | import java.io.IOException; |
| 29 | import java.io.PrintStream; |
| 30 | import java.io.PrintWriter; |
| 31 | import java.io.InputStream; |
| 32 | import java.io.OutputStream; |
| 33 | import java.io.Reader; |
| 34 | import java.io.Writer; |
| 35 | import java.io.OutputStreamWriter; |
| 36 | import java.io.BufferedWriter; |
| 37 | |
| 38 | /** |
| 39 | * The <code>Properties</code> class represents a persistent set of |
| 40 | * properties. The <code>Properties</code> can be saved to a stream |
| 41 | * or loaded from a stream. Each key and its corresponding value in |
| 42 | * the property list is a string. |
| 43 | * <p> |
| 44 | * A property list can contain another property list as its |
| 45 | * "defaults"; this second property list is searched if |
| 46 | * the property key is not found in the original property list. |
| 47 | * <p> |
| 48 | * Because <code>Properties</code> inherits from <code>Hashtable</code>, the |
| 49 | * <code>put</code> and <code>putAll</code> methods can be applied to a |
| 50 | * <code>Properties</code> object. Their use is strongly discouraged as they |
| 51 | * allow the caller to insert entries whose keys or values are not |
| 52 | * <code>Strings</code>. The <code>setProperty</code> method should be used |
| 53 | * instead. If the <code>store</code> or <code>save</code> method is called |
| 54 | * on a "compromised" <code>Properties</code> object that contains a |
| 55 | * non-<code>String</code> key or value, the call will fail. Similarly, |
| 56 | * the call to the <code>propertyNames</code> or <code>list</code> method |
| 57 | * will fail if it is called on a "compromised" <code>Properties</code> |
| 58 | * object that contains a non-<code>String</code> key. |
| 59 | * |
| 60 | * <p> |
| 61 | * The {@link #load(java.io.Reader) load(Reader)} <tt>/</tt> |
| 62 | * {@link #store(java.io.Writer, java.lang.String) store(Writer, String)} |
| 63 | * methods load and store properties from and to a character based stream |
| 64 | * in a simple line-oriented format specified below. |
| 65 | * |
| 66 | * The {@link #load(java.io.InputStream) load(InputStream)} <tt>/</tt> |
| 67 | * {@link #store(java.io.OutputStream, java.lang.String) store(OutputStream, String)} |
| 68 | * methods work the same way as the load(Reader)/store(Writer, String) pair, except |
| 69 | * the input/output stream is encoded in ISO 8859-1 character encoding. |
| 70 | * Characters that cannot be directly represented in this encoding can be written using |
| 71 | * <a href="http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.3">Unicode escapes</a> |
| 72 | * ; only a single 'u' character is allowed in an escape |
| 73 | * sequence. The native2ascii tool can be used to convert property files to and |
| 74 | * from other character encodings. |
| 75 | * |
| 76 | * <p> The {@link #loadFromXML(InputStream)} and {@link |
| 77 | * #storeToXML(OutputStream, String, String)} methods load and store properties |
| 78 | * in a simple XML format. By default the UTF-8 character encoding is used, |
| 79 | * however a specific encoding may be specified if required. An XML properties |
| 80 | * document has the following DOCTYPE declaration: |
| 81 | * |
| 82 | * <pre> |
| 83 | * <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"> |
| 84 | * </pre> |
| 85 | * Note that the system URI (http://java.sun.com/dtd/properties.dtd) is |
| 86 | * <i>not</i> accessed when exporting or importing properties; it merely |
| 87 | * serves as a string to uniquely identify the DTD, which is: |
| 88 | * <pre> |
| 89 | * <?xml version="1.0" encoding="UTF-8"?> |
| 90 | * |
| 91 | * <!-- DTD for properties --> |
| 92 | * |
| 93 | * <!ELEMENT properties ( comment?, entry* ) > |
| 94 | * |
| 95 | * <!ATTLIST properties version CDATA #FIXED "1.0"> |
| 96 | * |
| 97 | * <!ELEMENT comment (#PCDATA) > |
| 98 | * |
| 99 | * <!ELEMENT entry (#PCDATA) > |
| 100 | * |
| 101 | * <!ATTLIST entry key CDATA #REQUIRED> |
| 102 | * </pre> |
| 103 | * |
| 104 | * @see <a href="../../../technotes/tools/solaris/native2ascii.html">native2ascii tool for Solaris</a> |
| 105 | * @see <a href="../../../technotes/tools/windows/native2ascii.html">native2ascii tool for Windows</a> |
| 106 | * |
| 107 | * <p>This class is thread-safe: multiple threads can share a single |
| 108 | * <tt>Properties</tt> object without the need for external synchronization. |
| 109 | * |
| 110 | * @author Arthur van Hoff |
| 111 | * @author Michael McCloskey |
| 112 | * @author Xueming Shen |
| 113 | * @since JDK1.0 |
| 114 | */ |
| 115 | public |
| 116 | class Properties extends Hashtable<Object,Object> { |
| 117 | /** |
| 118 | * use serialVersionUID from JDK 1.1.X for interoperability |
| 119 | */ |
| 120 | private static final long serialVersionUID = 4112578634029874840L; |
| 121 | |
| 122 | /** |
| 123 | * A property list that contains default values for any keys not |
| 124 | * found in this property list. |
| 125 | * |
| 126 | * @serial |
| 127 | */ |
| 128 | protected Properties defaults; |
| 129 | |
| 130 | /** |
| 131 | * Creates an empty property list with no default values. |
| 132 | */ |
| 133 | public Properties() { |
| 134 | this(null); |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Creates an empty property list with the specified defaults. |
| 139 | * |
| 140 | * @param defaults the defaults. |
| 141 | */ |
| 142 | public Properties(Properties defaults) { |
| 143 | this.defaults = defaults; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Calls the <tt>Hashtable</tt> method <code>put</code>. Provided for |
| 148 | * parallelism with the <tt>getProperty</tt> method. Enforces use of |
| 149 | * strings for property keys and values. The value returned is the |
| 150 | * result of the <tt>Hashtable</tt> call to <code>put</code>. |
| 151 | * |
| 152 | * @param key the key to be placed into this property list. |
| 153 | * @param value the value corresponding to <tt>key</tt>. |
| 154 | * @return the previous value of the specified key in this property |
| 155 | * list, or <code>null</code> if it did not have one. |
| 156 | * @see #getProperty |
| 157 | * @since 1.2 |
| 158 | */ |
| 159 | public synchronized Object setProperty(String key, String value) { |
| 160 | return put(key, value); |
| 161 | } |
| 162 | |
| 163 | |
| 164 | /** |
| 165 | * Reads a property list (key and element pairs) from the input |
| 166 | * character stream in a simple line-oriented format. |
| 167 | * <p> |
| 168 | * Properties are processed in terms of lines. There are two |
| 169 | * kinds of line, <i>natural lines</i> and <i>logical lines</i>. |
| 170 | * A natural line is defined as a line of |
| 171 | * characters that is terminated either by a set of line terminator |
| 172 | * characters (<code>\n</code> or <code>\r</code> or <code>\r\n</code>) |
| 173 | * or by the end of the stream. A natural line may be either a blank line, |
| 174 | * a comment line, or hold all or some of a key-element pair. A logical |
| 175 | * line holds all the data of a key-element pair, which may be spread |
| 176 | * out across several adjacent natural lines by escaping |
| 177 | * the line terminator sequence with a backslash character |
| 178 | * <code>\</code>. Note that a comment line cannot be extended |
| 179 | * in this manner; every natural line that is a comment must have |
| 180 | * its own comment indicator, as described below. Lines are read from |
| 181 | * input until the end of the stream is reached. |
| 182 | * |
| 183 | * <p> |
| 184 | * A natural line that contains only white space characters is |
| 185 | * considered blank and is ignored. A comment line has an ASCII |
| 186 | * <code>'#'</code> or <code>'!'</code> as its first non-white |
| 187 | * space character; comment lines are also ignored and do not |
| 188 | * encode key-element information. In addition to line |
| 189 | * terminators, this format considers the characters space |
| 190 | * (<code>' '</code>, <code>'\u0020'</code>), tab |
| 191 | * (<code>'\t'</code>, <code>'\u0009'</code>), and form feed |
| 192 | * (<code>'\f'</code>, <code>'\u000C'</code>) to be white |
| 193 | * space. |
| 194 | * |
| 195 | * <p> |
| 196 | * If a logical line is spread across several natural lines, the |
| 197 | * backslash escaping the line terminator sequence, the line |
| 198 | * terminator sequence, and any white space at the start of the |
| 199 | * following line have no affect on the key or element values. |
| 200 | * The remainder of the discussion of key and element parsing |
| 201 | * (when loading) will assume all the characters constituting |
| 202 | * the key and element appear on a single natural line after |
| 203 | * line continuation characters have been removed. Note that |
| 204 | * it is <i>not</i> sufficient to only examine the character |
| 205 | * preceding a line terminator sequence to decide if the line |
| 206 | * terminator is escaped; there must be an odd number of |
| 207 | * contiguous backslashes for the line terminator to be escaped. |
| 208 | * Since the input is processed from left to right, a |
| 209 | * non-zero even number of 2<i>n</i> contiguous backslashes |
| 210 | * before a line terminator (or elsewhere) encodes <i>n</i> |
| 211 | * backslashes after escape processing. |
| 212 | * |
| 213 | * <p> |
| 214 | * The key contains all of the characters in the line starting |
| 215 | * with the first non-white space character and up to, but not |
| 216 | * including, the first unescaped <code>'='</code>, |
| 217 | * <code>':'</code>, or white space character other than a line |
| 218 | * terminator. All of these key termination characters may be |
| 219 | * included in the key by escaping them with a preceding backslash |
| 220 | * character; for example,<p> |
| 221 | * |
| 222 | * <code>\:\=</code><p> |
| 223 | * |
| 224 | * would be the two-character key <code>":="</code>. Line |
| 225 | * terminator characters can be included using <code>\r</code> and |
| 226 | * <code>\n</code> escape sequences. Any white space after the |
| 227 | * key is skipped; if the first non-white space character after |
| 228 | * the key is <code>'='</code> or <code>':'</code>, then it is |
| 229 | * ignored and any white space characters after it are also |
| 230 | * skipped. All remaining characters on the line become part of |
| 231 | * the associated element string; if there are no remaining |
| 232 | * characters, the element is the empty string |
| 233 | * <code>""</code>. Once the raw character sequences |
| 234 | * constituting the key and element are identified, escape |
| 235 | * processing is performed as described above. |
| 236 | * |
| 237 | * <p> |
| 238 | * As an example, each of the following three lines specifies the key |
| 239 | * <code>"Truth"</code> and the associated element value |
| 240 | * <code>"Beauty"</code>: |
| 241 | * <p> |
| 242 | * <pre> |
| 243 | * Truth = Beauty |
| 244 | * Truth:Beauty |
| 245 | * Truth :Beauty |
| 246 | * </pre> |
| 247 | * As another example, the following three lines specify a single |
| 248 | * property: |
| 249 | * <p> |
| 250 | * <pre> |
| 251 | * fruits apple, banana, pear, \ |
| 252 | * cantaloupe, watermelon, \ |
| 253 | * kiwi, mango |
| 254 | * </pre> |
| 255 | * The key is <code>"fruits"</code> and the associated element is: |
| 256 | * <p> |
| 257 | * <pre>"apple, banana, pear, cantaloupe, watermelon, kiwi, mango"</pre> |
| 258 | * Note that a space appears before each <code>\</code> so that a space |
| 259 | * will appear after each comma in the final result; the <code>\</code>, |
| 260 | * line terminator, and leading white space on the continuation line are |
| 261 | * merely discarded and are <i>not</i> replaced by one or more other |
| 262 | * characters. |
| 263 | * <p> |
| 264 | * As a third example, the line: |
| 265 | * <p> |
| 266 | * <pre>cheeses |
| 267 | * </pre> |
| 268 | * specifies that the key is <code>"cheeses"</code> and the associated |
| 269 | * element is the empty string <code>""</code>.<p> |
| 270 | * <p> |
| 271 | * |
| 272 | * <a name="unicodeescapes"></a> |
| 273 | * Characters in keys and elements can be represented in escape |
| 274 | * sequences similar to those used for character and string literals |
| 275 | * (see <a |
| 276 | * href="http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.3">§3.3</a> |
| 277 | * and <a |
| 278 | * href="http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.10.6">§3.10.6</a> |
| 279 | * of the <i>Java Language Specification</i>). |
| 280 | * |
| 281 | * The differences from the character escape sequences and Unicode |
| 282 | * escapes used for characters and strings are: |
| 283 | * |
| 284 | * <ul> |
| 285 | * <li> Octal escapes are not recognized. |
| 286 | * |
| 287 | * <li> The character sequence <code>\b</code> does <i>not</i> |
| 288 | * represent a backspace character. |
| 289 | * |
| 290 | * <li> The method does not treat a backslash character, |
| 291 | * <code>\</code>, before a non-valid escape character as an |
| 292 | * error; the backslash is silently dropped. For example, in a |
| 293 | * Java string the sequence <code>"\z"</code> would cause a |
| 294 | * compile time error. In contrast, this method silently drops |
| 295 | * the backslash. Therefore, this method treats the two character |
| 296 | * sequence <code>"\b"</code> as equivalent to the single |
| 297 | * character <code>'b'</code>. |
| 298 | * |
| 299 | * <li> Escapes are not necessary for single and double quotes; |
| 300 | * however, by the rule above, single and double quote characters |
| 301 | * preceded by a backslash still yield single and double quote |
| 302 | * characters, respectively. |
| 303 | * |
| 304 | * <li> Only a single 'u' character is allowed in a Uniocde escape |
| 305 | * sequence. |
| 306 | * |
| 307 | * </ul> |
| 308 | * <p> |
| 309 | * The specified stream remains open after this method returns. |
| 310 | * |
| 311 | * @param reader the input character stream. |
| 312 | * @throws IOException if an error occurred when reading from the |
| 313 | * input stream. |
| 314 | * @throws IllegalArgumentException if a malformed Unicode escape |
| 315 | * appears in the input. |
| 316 | * @since 1.6 |
| 317 | */ |
| 318 | public synchronized void load(Reader reader) throws IOException { |
| 319 | load0(new LineReader(reader)); |
| 320 | } |
| 321 | |
| 322 | /** |
| 323 | * Reads a property list (key and element pairs) from the input |
| 324 | * byte stream. The input stream is in a simple line-oriented |
| 325 | * format as specified in |
| 326 | * {@link #load(java.io.Reader) load(Reader)} and is assumed to use |
| 327 | * the ISO 8859-1 character encoding; that is each byte is one Latin1 |
| 328 | * character. Characters not in Latin1, and certain special characters, |
| 329 | * are represented in keys and elements using |
| 330 | * <a href="http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.3">Unicode escapes</a>. |
| 331 | * <p> |
| 332 | * The specified stream remains open after this method returns. |
| 333 | * |
| 334 | * @param inStream the input stream. |
| 335 | * @exception IOException if an error occurred when reading from the |
| 336 | * input stream. |
| 337 | * @throws IllegalArgumentException if the input stream contains a |
| 338 | * malformed Unicode escape sequence. |
| 339 | * @since 1.2 |
| 340 | */ |
| 341 | public synchronized void load(InputStream inStream) throws IOException { |
| 342 | load0(new LineReader(inStream)); |
| 343 | } |
| 344 | |
| 345 | private void load0 (LineReader lr) throws IOException { |
| 346 | char[] convtBuf = new char[1024]; |
| 347 | int limit; |
| 348 | int keyLen; |
| 349 | int valueStart; |
| 350 | char c; |
| 351 | boolean hasSep; |
| 352 | boolean precedingBackslash; |
| 353 | |
| 354 | while ((limit = lr.readLine()) >= 0) { |
| 355 | c = 0; |
| 356 | keyLen = 0; |
| 357 | valueStart = limit; |
| 358 | hasSep = false; |
| 359 | |
| 360 | //System.out.println("line=<" + new String(lineBuf, 0, limit) + ">"); |
| 361 | precedingBackslash = false; |
| 362 | while (keyLen < limit) { |
| 363 | c = lr.lineBuf[keyLen]; |
| 364 | //need check if escaped. |
| 365 | if ((c == '=' || c == ':') && !precedingBackslash) { |
| 366 | valueStart = keyLen + 1; |
| 367 | hasSep = true; |
| 368 | break; |
| 369 | } else if ((c == ' ' || c == '\t' || c == '\f') && !precedingBackslash) { |
| 370 | valueStart = keyLen + 1; |
| 371 | break; |
| 372 | } |
| 373 | if (c == '\\') { |
| 374 | precedingBackslash = !precedingBackslash; |
| 375 | } else { |
| 376 | precedingBackslash = false; |
| 377 | } |
| 378 | keyLen++; |
| 379 | } |
| 380 | while (valueStart < limit) { |
| 381 | c = lr.lineBuf[valueStart]; |
| 382 | if (c != ' ' && c != '\t' && c != '\f') { |
| 383 | if (!hasSep && (c == '=' || c == ':')) { |
| 384 | hasSep = true; |
| 385 | } else { |
| 386 | break; |
| 387 | } |
| 388 | } |
| 389 | valueStart++; |
| 390 | } |
| 391 | String key = loadConvert(lr.lineBuf, 0, keyLen, convtBuf); |
| 392 | String value = loadConvert(lr.lineBuf, valueStart, limit - valueStart, convtBuf); |
| 393 | put(key, value); |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | /* Read in a "logical line" from an InputStream/Reader, skip all comment |
| 398 | * and blank lines and filter out those leading whitespace characters |
| 399 | * (\u0020, \u0009 and \u000c) from the beginning of a "natural line". |
| 400 | * Method returns the char length of the "logical line" and stores |
| 401 | * the line in "lineBuf". |
| 402 | */ |
| 403 | class LineReader { |
| 404 | public LineReader(InputStream inStream) { |
| 405 | this.inStream = inStream; |
| 406 | inByteBuf = new byte[8192]; |
| 407 | } |
| 408 | |
| 409 | public LineReader(Reader reader) { |
| 410 | this.reader = reader; |
| 411 | inCharBuf = new char[8192]; |
| 412 | } |
| 413 | |
| 414 | byte[] inByteBuf; |
| 415 | char[] inCharBuf; |
| 416 | char[] lineBuf = new char[1024]; |
| 417 | int inLimit = 0; |
| 418 | int inOff = 0; |
| 419 | InputStream inStream; |
| 420 | Reader reader; |
| 421 | |
| 422 | int readLine() throws IOException { |
| 423 | int len = 0; |
| 424 | char c = 0; |
| 425 | |
| 426 | boolean skipWhiteSpace = true; |
| 427 | boolean isCommentLine = false; |
| 428 | boolean isNewLine = true; |
| 429 | boolean appendedLineBegin = false; |
| 430 | boolean precedingBackslash = false; |
| 431 | boolean skipLF = false; |
| 432 | |
| 433 | while (true) { |
| 434 | if (inOff >= inLimit) { |
| 435 | inLimit = (inStream==null)?reader.read(inCharBuf) |
| 436 | :inStream.read(inByteBuf); |
| 437 | inOff = 0; |
| 438 | if (inLimit <= 0) { |
| 439 | if (len == 0 || isCommentLine) { |
| 440 | return -1; |
| 441 | } |
| 442 | return len; |
| 443 | } |
| 444 | } |
| 445 | if (inStream != null) { |
| 446 | //The line below is equivalent to calling a |
| 447 | //ISO8859-1 decoder. |
| 448 | c = (char) (0xff & inByteBuf[inOff++]); |
| 449 | } else { |
| 450 | c = inCharBuf[inOff++]; |
| 451 | } |
| 452 | if (skipLF) { |
| 453 | skipLF = false; |
| 454 | if (c == '\n') { |
| 455 | continue; |
| 456 | } |
| 457 | } |
| 458 | if (skipWhiteSpace) { |
| 459 | if (c == ' ' || c == '\t' || c == '\f') { |
| 460 | continue; |
| 461 | } |
| 462 | if (!appendedLineBegin && (c == '\r' || c == '\n')) { |
| 463 | continue; |
| 464 | } |
| 465 | skipWhiteSpace = false; |
| 466 | appendedLineBegin = false; |
| 467 | } |
| 468 | if (isNewLine) { |
| 469 | isNewLine = false; |
| 470 | if (c == '#' || c == '!') { |
| 471 | isCommentLine = true; |
| 472 | continue; |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | if (c != '\n' && c != '\r') { |
| 477 | lineBuf[len++] = c; |
| 478 | if (len == lineBuf.length) { |
| 479 | int newLength = lineBuf.length * 2; |
| 480 | if (newLength < 0) { |
| 481 | newLength = Integer.MAX_VALUE; |
| 482 | } |
| 483 | char[] buf = new char[newLength]; |
| 484 | System.arraycopy(lineBuf, 0, buf, 0, lineBuf.length); |
| 485 | lineBuf = buf; |
| 486 | } |
| 487 | //flip the preceding backslash flag |
| 488 | if (c == '\\') { |
| 489 | precedingBackslash = !precedingBackslash; |
| 490 | } else { |
| 491 | precedingBackslash = false; |
| 492 | } |
| 493 | } |
| 494 | else { |
| 495 | // reached EOL |
| 496 | if (isCommentLine || len == 0) { |
| 497 | isCommentLine = false; |
| 498 | isNewLine = true; |
| 499 | skipWhiteSpace = true; |
| 500 | len = 0; |
| 501 | continue; |
| 502 | } |
| 503 | if (inOff >= inLimit) { |
| 504 | inLimit = (inStream==null) |
| 505 | ?reader.read(inCharBuf) |
| 506 | :inStream.read(inByteBuf); |
| 507 | inOff = 0; |
| 508 | if (inLimit <= 0) { |
| 509 | return len; |
| 510 | } |
| 511 | } |
| 512 | if (precedingBackslash) { |
| 513 | len -= 1; |
| 514 | //skip the leading whitespace characters in following line |
| 515 | skipWhiteSpace = true; |
| 516 | appendedLineBegin = true; |
| 517 | precedingBackslash = false; |
| 518 | if (c == '\r') { |
| 519 | skipLF = true; |
| 520 | } |
| 521 | } else { |
| 522 | return len; |
| 523 | } |
| 524 | } |
| 525 | } |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * Converts encoded \uxxxx to unicode chars |
| 531 | * and changes special saved chars to their original forms |
| 532 | */ |
| 533 | private String loadConvert (char[] in, int off, int len, char[] convtBuf) { |
| 534 | if (convtBuf.length < len) { |
| 535 | int newLen = len * 2; |
| 536 | if (newLen < 0) { |
| 537 | newLen = Integer.MAX_VALUE; |
| 538 | } |
| 539 | convtBuf = new char[newLen]; |
| 540 | } |
| 541 | char aChar; |
| 542 | char[] out = convtBuf; |
| 543 | int outLen = 0; |
| 544 | int end = off + len; |
| 545 | |
| 546 | while (off < end) { |
| 547 | aChar = in[off++]; |
| 548 | if (aChar == '\\') { |
| 549 | aChar = in[off++]; |
| 550 | if(aChar == 'u') { |
| 551 | // Read the xxxx |
| 552 | int value=0; |
| 553 | for (int i=0; i<4; i++) { |
| 554 | aChar = in[off++]; |
| 555 | switch (aChar) { |
| 556 | case '0': case '1': case '2': case '3': case '4': |
| 557 | case '5': case '6': case '7': case '8': case '9': |
| 558 | value = (value << 4) + aChar - '0'; |
| 559 | break; |
| 560 | case 'a': case 'b': case 'c': |
| 561 | case 'd': case 'e': case 'f': |
| 562 | value = (value << 4) + 10 + aChar - 'a'; |
| 563 | break; |
| 564 | case 'A': case 'B': case 'C': |
| 565 | case 'D': case 'E': case 'F': |
| 566 | value = (value << 4) + 10 + aChar - 'A'; |
| 567 | break; |
| 568 | default: |
| 569 | throw new IllegalArgumentException( |
| 570 | "Malformed \\uxxxx encoding."); |
| 571 | } |
| 572 | } |
| 573 | out[outLen++] = (char)value; |
| 574 | } else { |
| 575 | if (aChar == 't') aChar = '\t'; |
| 576 | else if (aChar == 'r') aChar = '\r'; |
| 577 | else if (aChar == 'n') aChar = '\n'; |
| 578 | else if (aChar == 'f') aChar = '\f'; |
| 579 | out[outLen++] = aChar; |
| 580 | } |
| 581 | } else { |
| 582 | out[outLen++] = aChar; |
| 583 | } |
| 584 | } |
| 585 | return new String (out, 0, outLen); |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * Converts unicodes to encoded \uxxxx and escapes |
| 590 | * special characters with a preceding slash |
| 591 | */ |
| 592 | private String saveConvert(String theString, |
| 593 | boolean escapeSpace, |
| 594 | boolean escapeUnicode) { |
| 595 | int len = theString.length(); |
| 596 | int bufLen = len * 2; |
| 597 | if (bufLen < 0) { |
| 598 | bufLen = Integer.MAX_VALUE; |
| 599 | } |
| 600 | StringBuffer outBuffer = new StringBuffer(bufLen); |
| 601 | |
| 602 | for(int x=0; x<len; x++) { |
| 603 | char aChar = theString.charAt(x); |
| 604 | // Handle common case first, selecting largest block that |
| 605 | // avoids the specials below |
| 606 | if ((aChar > 61) && (aChar < 127)) { |
| 607 | if (aChar == '\\') { |
| 608 | outBuffer.append('\\'); outBuffer.append('\\'); |
| 609 | continue; |
| 610 | } |
| 611 | outBuffer.append(aChar); |
| 612 | continue; |
| 613 | } |
| 614 | switch(aChar) { |
| 615 | case ' ': |
| 616 | if (x == 0 || escapeSpace) |
| 617 | outBuffer.append('\\'); |
| 618 | outBuffer.append(' '); |
| 619 | break; |
| 620 | case '\t':outBuffer.append('\\'); outBuffer.append('t'); |
| 621 | break; |
| 622 | case '\n':outBuffer.append('\\'); outBuffer.append('n'); |
| 623 | break; |
| 624 | case '\r':outBuffer.append('\\'); outBuffer.append('r'); |
| 625 | break; |
| 626 | case '\f':outBuffer.append('\\'); outBuffer.append('f'); |
| 627 | break; |
| 628 | case '=': // Fall through |
| 629 | case ':': // Fall through |
| 630 | case '#': // Fall through |
| 631 | case '!': |
| 632 | outBuffer.append('\\'); outBuffer.append(aChar); |
| 633 | break; |
| 634 | default: |
| 635 | if (((aChar < 0x0020) || (aChar > 0x007e)) & escapeUnicode ) { |
| 636 | outBuffer.append('\\'); |
| 637 | outBuffer.append('u'); |
| 638 | outBuffer.append(toHex((aChar >> 12) & 0xF)); |
| 639 | outBuffer.append(toHex((aChar >> 8) & 0xF)); |
| 640 | outBuffer.append(toHex((aChar >> 4) & 0xF)); |
| 641 | outBuffer.append(toHex( aChar & 0xF)); |
| 642 | } else { |
| 643 | outBuffer.append(aChar); |
| 644 | } |
| 645 | } |
| 646 | } |
| 647 | return outBuffer.toString(); |
| 648 | } |
| 649 | |
| 650 | private static void writeComments(BufferedWriter bw, String comments) |
| 651 | throws IOException { |
| 652 | bw.write("#"); |
| 653 | int len = comments.length(); |
| 654 | int current = 0; |
| 655 | int last = 0; |
| 656 | char[] uu = new char[6]; |
| 657 | uu[0] = '\\'; |
| 658 | uu[1] = 'u'; |
| 659 | while (current < len) { |
| 660 | char c = comments.charAt(current); |
| 661 | if (c > '\u00ff' || c == '\n' || c == '\r') { |
| 662 | if (last != current) |
| 663 | bw.write(comments.substring(last, current)); |
| 664 | if (c > '\u00ff') { |
| 665 | uu[2] = toHex((c >> 12) & 0xf); |
| 666 | uu[3] = toHex((c >> 8) & 0xf); |
| 667 | uu[4] = toHex((c >> 4) & 0xf); |
| 668 | uu[5] = toHex( c & 0xf); |
| 669 | bw.write(new String(uu)); |
| 670 | } else { |
| 671 | bw.newLine(); |
| 672 | if (c == '\r' && |
| 673 | current != len - 1 && |
| 674 | comments.charAt(current + 1) == '\n') { |
| 675 | current++; |
| 676 | } |
| 677 | if (current == len - 1 || |
| 678 | (comments.charAt(current + 1) != '#' && |
| 679 | comments.charAt(current + 1) != '!')) |
| 680 | bw.write("#"); |
| 681 | } |
| 682 | last = current + 1; |
| 683 | } |
| 684 | current++; |
| 685 | } |
| 686 | if (last != current) |
| 687 | bw.write(comments.substring(last, current)); |
| 688 | bw.newLine(); |
| 689 | } |
| 690 | |
| 691 | /** |
| 692 | * Calls the <code>store(OutputStream out, String comments)</code> method |
| 693 | * and suppresses IOExceptions that were thrown. |
| 694 | * |
| 695 | * @deprecated This method does not throw an IOException if an I/O error |
| 696 | * occurs while saving the property list. The preferred way to save a |
| 697 | * properties list is via the <code>store(OutputStream out, |
| 698 | * String comments)</code> method or the |
| 699 | * <code>storeToXML(OutputStream os, String comment)</code> method. |
| 700 | * |
| 701 | * @param out an output stream. |
| 702 | * @param comments a description of the property list. |
| 703 | * @exception ClassCastException if this <code>Properties</code> object |
| 704 | * contains any keys or values that are not |
| 705 | * <code>Strings</code>. |
| 706 | */ |
| 707 | @Deprecated |
| 708 | public synchronized void save(OutputStream out, String comments) { |
| 709 | try { |
| 710 | store(out, comments); |
| 711 | } catch (IOException e) { |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * Writes this property list (key and element pairs) in this |
| 717 | * <code>Properties</code> table to the output character stream in a |
| 718 | * format suitable for using the {@link #load(java.io.Reader) load(Reader)} |
| 719 | * method. |
| 720 | * <p> |
| 721 | * Properties from the defaults table of this <code>Properties</code> |
| 722 | * table (if any) are <i>not</i> written out by this method. |
| 723 | * <p> |
| 724 | * If the comments argument is not null, then an ASCII <code>#</code> |
| 725 | * character, the comments string, and a line separator are first written |
| 726 | * to the output stream. Thus, the <code>comments</code> can serve as an |
| 727 | * identifying comment. Any one of a line feed ('\n'), a carriage |
| 728 | * return ('\r'), or a carriage return followed immediately by a line feed |
| 729 | * in comments is replaced by a line separator generated by the <code>Writer</code> |
| 730 | * and if the next character in comments is not character <code>#</code> or |
| 731 | * character <code>!</code> then an ASCII <code>#</code> is written out |
| 732 | * after that line separator. |
| 733 | * <p> |
| 734 | * Next, a comment line is always written, consisting of an ASCII |
| 735 | * <code>#</code> character, the current date and time (as if produced |
| 736 | * by the <code>toString</code> method of <code>Date</code> for the |
| 737 | * current time), and a line separator as generated by the <code>Writer</code>. |
| 738 | * <p> |
| 739 | * Then every entry in this <code>Properties</code> table is |
| 740 | * written out, one per line. For each entry the key string is |
| 741 | * written, then an ASCII <code>=</code>, then the associated |
| 742 | * element string. For the key, all space characters are |
| 743 | * written with a preceding <code>\</code> character. For the |
| 744 | * element, leading space characters, but not embedded or trailing |
| 745 | * space characters, are written with a preceding <code>\</code> |
| 746 | * character. The key and element characters <code>#</code>, |
| 747 | * <code>!</code>, <code>=</code>, and <code>:</code> are written |
| 748 | * with a preceding backslash to ensure that they are properly loaded. |
| 749 | * <p> |
| 750 | * After the entries have been written, the output stream is flushed. |
| 751 | * The output stream remains open after this method returns. |
| 752 | * <p> |
| 753 | * |
| 754 | * @param writer an output character stream writer. |
| 755 | * @param comments a description of the property list. |
| 756 | * @exception IOException if writing this property list to the specified |
| 757 | * output stream throws an <tt>IOException</tt>. |
| 758 | * @exception ClassCastException if this <code>Properties</code> object |
| 759 | * contains any keys or values that are not <code>Strings</code>. |
| 760 | * @exception NullPointerException if <code>writer</code> is null. |
| 761 | * @since 1.6 |
| 762 | */ |
| 763 | public void store(Writer writer, String comments) |
| 764 | throws IOException |
| 765 | { |
| 766 | store0((writer instanceof BufferedWriter)?(BufferedWriter)writer |
| 767 | : new BufferedWriter(writer), |
| 768 | comments, |
| 769 | false); |
| 770 | } |
| 771 | |
| 772 | /** |
| 773 | * Writes this property list (key and element pairs) in this |
| 774 | * <code>Properties</code> table to the output stream in a format suitable |
| 775 | * for loading into a <code>Properties</code> table using the |
| 776 | * {@link #load(InputStream) load(InputStream)} method. |
| 777 | * <p> |
| 778 | * Properties from the defaults table of this <code>Properties</code> |
| 779 | * table (if any) are <i>not</i> written out by this method. |
| 780 | * <p> |
| 781 | * This method outputs the comments, properties keys and values in |
| 782 | * the same format as specified in |
| 783 | * {@link #store(java.io.Writer, java.lang.String) store(Writer)}, |
| 784 | * with the following differences: |
| 785 | * <ul> |
| 786 | * <li>The stream is written using the ISO 8859-1 character encoding. |
| 787 | * |
| 788 | * <li>Characters not in Latin-1 in the comments are written as |
| 789 | * <code>\u</code><i>xxxx</i> for their appropriate unicode |
| 790 | * hexadecimal value <i>xxxx</i>. |
| 791 | * |
| 792 | * <li>Characters less than <code>\u0020</code> and characters greater |
| 793 | * than <code>\u007E</code> in property keys or values are written |
| 794 | * as <code>\u</code><i>xxxx</i> for the appropriate hexadecimal |
| 795 | * value <i>xxxx</i>. |
| 796 | * </ul> |
| 797 | * <p> |
| 798 | * After the entries have been written, the output stream is flushed. |
| 799 | * The output stream remains open after this method returns. |
| 800 | * <p> |
| 801 | * @param out an output stream. |
| 802 | * @param comments a description of the property list. |
| 803 | * @exception IOException if writing this property list to the specified |
| 804 | * output stream throws an <tt>IOException</tt>. |
| 805 | * @exception ClassCastException if this <code>Properties</code> object |
| 806 | * contains any keys or values that are not <code>Strings</code>. |
| 807 | * @exception NullPointerException if <code>out</code> is null. |
| 808 | * @since 1.2 |
| 809 | */ |
| 810 | public void store(OutputStream out, String comments) |
| 811 | throws IOException |
| 812 | { |
| 813 | store0(new BufferedWriter(new OutputStreamWriter(out, "8859_1")), |
| 814 | comments, |
| 815 | true); |
| 816 | } |
| 817 | |
| 818 | private void store0(BufferedWriter bw, String comments, boolean escUnicode) |
| 819 | throws IOException |
| 820 | { |
| 821 | if (comments != null) { |
| 822 | writeComments(bw, comments); |
| 823 | } |
| 824 | bw.write("#" + new Date().toString()); |
| 825 | bw.newLine(); |
| 826 | synchronized (this) { |
| 827 | for (Enumeration e = keys(); e.hasMoreElements();) { |
| 828 | String key = (String)e.nextElement(); |
| 829 | String val = (String)get(key); |
| 830 | key = saveConvert(key, true, escUnicode); |
| 831 | /* No need to escape embedded and trailing spaces for value, hence |
| 832 | * pass false to flag. |
| 833 | */ |
| 834 | val = saveConvert(val, false, escUnicode); |
| 835 | bw.write(key + "=" + val); |
| 836 | bw.newLine(); |
| 837 | } |
| 838 | } |
| 839 | bw.flush(); |
| 840 | } |
| 841 | |
| 842 | /** |
| 843 | * Loads all of the properties represented by the XML document on the |
| 844 | * specified input stream into this properties table. |
| 845 | * |
| 846 | * <p>The XML document must have the following DOCTYPE declaration: |
| 847 | * <pre> |
| 848 | * <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"> |
| 849 | * </pre> |
| 850 | * Furthermore, the document must satisfy the properties DTD described |
| 851 | * above. |
| 852 | * |
| 853 | * <p>The specified stream is closed after this method returns. |
| 854 | * |
| 855 | * @param in the input stream from which to read the XML document. |
| 856 | * @throws IOException if reading from the specified input stream |
| 857 | * results in an <tt>IOException</tt>. |
| 858 | * @throws InvalidPropertiesFormatException Data on input stream does not |
| 859 | * constitute a valid XML document with the mandated document type. |
| 860 | * @throws NullPointerException if <code>in</code> is null. |
| 861 | * @see #storeToXML(OutputStream, String, String) |
| 862 | * @since 1.5 |
| 863 | */ |
| 864 | public synchronized void loadFromXML(InputStream in) |
| 865 | throws IOException, InvalidPropertiesFormatException |
| 866 | { |
| 867 | if (in == null) |
| 868 | throw new NullPointerException(); |
| 869 | XMLUtils.load(this, in); |
| 870 | in.close(); |
| 871 | } |
| 872 | |
| 873 | /** |
| 874 | * Emits an XML document representing all of the properties contained |
| 875 | * in this table. |
| 876 | * |
| 877 | * <p> An invocation of this method of the form <tt>props.storeToXML(os, |
| 878 | * comment)</tt> behaves in exactly the same way as the invocation |
| 879 | * <tt>props.storeToXML(os, comment, "UTF-8");</tt>. |
| 880 | * |
| 881 | * @param os the output stream on which to emit the XML document. |
| 882 | * @param comment a description of the property list, or <code>null</code> |
| 883 | * if no comment is desired. |
| 884 | * @throws IOException if writing to the specified output stream |
| 885 | * results in an <tt>IOException</tt>. |
| 886 | * @throws NullPointerException if <code>os</code> is null. |
| 887 | * @throws ClassCastException if this <code>Properties</code> object |
| 888 | * contains any keys or values that are not |
| 889 | * <code>Strings</code>. |
| 890 | * @see #loadFromXML(InputStream) |
| 891 | * @since 1.5 |
| 892 | */ |
| 893 | public synchronized void storeToXML(OutputStream os, String comment) |
| 894 | throws IOException |
| 895 | { |
| 896 | if (os == null) |
| 897 | throw new NullPointerException(); |
| 898 | storeToXML(os, comment, "UTF-8"); |
| 899 | } |
| 900 | |
| 901 | /** |
| 902 | * Emits an XML document representing all of the properties contained |
| 903 | * in this table, using the specified encoding. |
| 904 | * |
| 905 | * <p>The XML document will have the following DOCTYPE declaration: |
| 906 | * <pre> |
| 907 | * <!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd"> |
| 908 | * </pre> |
| 909 | * |
| 910 | *<p>If the specified comment is <code>null</code> then no comment |
| 911 | * will be stored in the document. |
| 912 | * |
| 913 | * <p>The specified stream remains open after this method returns. |
| 914 | * |
| 915 | * @param os the output stream on which to emit the XML document. |
| 916 | * @param comment a description of the property list, or <code>null</code> |
| 917 | * if no comment is desired. |
| 918 | * @throws IOException if writing to the specified output stream |
| 919 | * results in an <tt>IOException</tt>. |
| 920 | * @throws NullPointerException if <code>os</code> is <code>null</code>, |
| 921 | * or if <code>encoding</code> is <code>null</code>. |
| 922 | * @throws ClassCastException if this <code>Properties</code> object |
| 923 | * contains any keys or values that are not |
| 924 | * <code>Strings</code>. |
| 925 | * @see #loadFromXML(InputStream) |
| 926 | * @since 1.5 |
| 927 | */ |
| 928 | public synchronized void storeToXML(OutputStream os, String comment, |
| 929 | String encoding) |
| 930 | throws IOException |
| 931 | { |
| 932 | if (os == null) |
| 933 | throw new NullPointerException(); |
| 934 | XMLUtils.save(this, os, comment, encoding); |
| 935 | } |
| 936 | |
| 937 | /** |
| 938 | * Searches for the property with the specified key in this property list. |
| 939 | * If the key is not found in this property list, the default property list, |
| 940 | * and its defaults, recursively, are then checked. The method returns |
| 941 | * <code>null</code> if the property is not found. |
| 942 | * |
| 943 | * @param key the property key. |
| 944 | * @return the value in this property list with the specified key value. |
| 945 | * @see #setProperty |
| 946 | * @see #defaults |
| 947 | */ |
| 948 | public String getProperty(String key) { |
| 949 | Object oval = super.get(key); |
| 950 | String sval = (oval instanceof String) ? (String)oval : null; |
| 951 | return ((sval == null) && (defaults != null)) ? defaults.getProperty(key) : sval; |
| 952 | } |
| 953 | |
| 954 | /** |
| 955 | * Searches for the property with the specified key in this property list. |
| 956 | * If the key is not found in this property list, the default property list, |
| 957 | * and its defaults, recursively, are then checked. The method returns the |
| 958 | * default value argument if the property is not found. |
| 959 | * |
| 960 | * @param key the hashtable key. |
| 961 | * @param defaultValue a default value. |
| 962 | * |
| 963 | * @return the value in this property list with the specified key value. |
| 964 | * @see #setProperty |
| 965 | * @see #defaults |
| 966 | */ |
| 967 | public String getProperty(String key, String defaultValue) { |
| 968 | String val = getProperty(key); |
| 969 | return (val == null) ? defaultValue : val; |
| 970 | } |
| 971 | |
| 972 | /** |
| 973 | * Returns an enumeration of all the keys in this property list, |
| 974 | * including distinct keys in the default property list if a key |
| 975 | * of the same name has not already been found from the main |
| 976 | * properties list. |
| 977 | * |
| 978 | * @return an enumeration of all the keys in this property list, including |
| 979 | * the keys in the default property list. |
| 980 | * @throws ClassCastException if any key in this property list |
| 981 | * is not a string. |
| 982 | * @see java.util.Enumeration |
| 983 | * @see java.util.Properties#defaults |
| 984 | * @see #stringPropertyNames |
| 985 | */ |
| 986 | public Enumeration<?> propertyNames() { |
| 987 | Hashtable h = new Hashtable(); |
| 988 | enumerate(h); |
| 989 | return h.keys(); |
| 990 | } |
| 991 | |
| 992 | /** |
| 993 | * Returns a set of keys in this property list where |
| 994 | * the key and its corresponding value are strings, |
| 995 | * including distinct keys in the default property list if a key |
| 996 | * of the same name has not already been found from the main |
| 997 | * properties list. Properties whose key or value is not |
| 998 | * of type <tt>String</tt> are omitted. |
| 999 | * <p> |
| 1000 | * The returned set is not backed by the <tt>Properties</tt> object. |
| 1001 | * Changes to this <tt>Properties</tt> are not reflected in the set, |
| 1002 | * or vice versa. |
| 1003 | * |
| 1004 | * @return a set of keys in this property list where |
| 1005 | * the key and its corresponding value are strings, |
| 1006 | * including the keys in the default property list. |
| 1007 | * @see java.util.Properties#defaults |
| 1008 | * @since 1.6 |
| 1009 | */ |
| 1010 | public Set<String> stringPropertyNames() { |
| 1011 | Hashtable<String, String> h = new Hashtable<String, String>(); |
| 1012 | enumerateStringProperties(h); |
| 1013 | return h.keySet(); |
| 1014 | } |
| 1015 | |
| 1016 | /** |
| 1017 | * Prints this property list out to the specified output stream. |
| 1018 | * This method is useful for debugging. |
| 1019 | * |
| 1020 | * @param out an output stream. |
| 1021 | * @throws ClassCastException if any key in this property list |
| 1022 | * is not a string. |
| 1023 | */ |
| 1024 | public void list(PrintStream out) { |
| 1025 | out.println("-- listing properties --"); |
| 1026 | Hashtable h = new Hashtable(); |
| 1027 | enumerate(h); |
| 1028 | for (Enumeration e = h.keys() ; e.hasMoreElements() ;) { |
| 1029 | String key = (String)e.nextElement(); |
| 1030 | String val = (String)h.get(key); |
| 1031 | if (val.length() > 40) { |
| 1032 | val = val.substring(0, 37) + "..."; |
| 1033 | } |
| 1034 | out.println(key + "=" + val); |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | /** |
| 1039 | * Prints this property list out to the specified output stream. |
| 1040 | * This method is useful for debugging. |
| 1041 | * |
| 1042 | * @param out an output stream. |
| 1043 | * @throws ClassCastException if any key in this property list |
| 1044 | * is not a string. |
| 1045 | * @since JDK1.1 |
| 1046 | */ |
| 1047 | /* |
| 1048 | * Rather than use an anonymous inner class to share common code, this |
| 1049 | * method is duplicated in order to ensure that a non-1.1 compiler can |
| 1050 | * compile this file. |
| 1051 | */ |
| 1052 | public void list(PrintWriter out) { |
| 1053 | out.println("-- listing properties --"); |
| 1054 | Hashtable h = new Hashtable(); |
| 1055 | enumerate(h); |
| 1056 | for (Enumeration e = h.keys() ; e.hasMoreElements() ;) { |
| 1057 | String key = (String)e.nextElement(); |
| 1058 | String val = (String)h.get(key); |
| 1059 | if (val.length() > 40) { |
| 1060 | val = val.substring(0, 37) + "..."; |
| 1061 | } |
| 1062 | out.println(key + "=" + val); |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | /** |
| 1067 | * Enumerates all key/value pairs in the specified hashtable. |
| 1068 | * @param h the hashtable |
| 1069 | * @throws ClassCastException if any of the property keys |
| 1070 | * is not of String type. |
| 1071 | */ |
| 1072 | private synchronized void enumerate(Hashtable h) { |
| 1073 | if (defaults != null) { |
| 1074 | defaults.enumerate(h); |
| 1075 | } |
| 1076 | for (Enumeration e = keys() ; e.hasMoreElements() ;) { |
| 1077 | String key = (String)e.nextElement(); |
| 1078 | h.put(key, get(key)); |
| 1079 | } |
| 1080 | } |
| 1081 | |
| 1082 | /** |
| 1083 | * Enumerates all key/value pairs in the specified hashtable |
| 1084 | * and omits the property if the key or value is not a string. |
| 1085 | * @param h the hashtable |
| 1086 | */ |
| 1087 | private synchronized void enumerateStringProperties(Hashtable<String, String> h) { |
| 1088 | if (defaults != null) { |
| 1089 | defaults.enumerateStringProperties(h); |
| 1090 | } |
| 1091 | for (Enumeration e = keys() ; e.hasMoreElements() ;) { |
| 1092 | Object k = e.nextElement(); |
| 1093 | Object v = get(k); |
| 1094 | if (k instanceof String && v instanceof String) { |
| 1095 | h.put((String) k, (String) v); |
| 1096 | } |
| 1097 | } |
| 1098 | } |
| 1099 | |
| 1100 | /** |
| 1101 | * Convert a nibble to a hex character |
| 1102 | * @param nibble the nibble to convert. |
| 1103 | */ |
| 1104 | private static char toHex(int nibble) { |
| 1105 | return hexDigit[(nibble & 0xF)]; |
| 1106 | } |
| 1107 | |
| 1108 | /** A table of hex digits */ |
| 1109 | private static final char[] hexDigit = { |
| 1110 | '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' |
| 1111 | }; |
| 1112 | } |